Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Analog Devices Inc. ADP1148AR-REEL

Name: ADP1148AR-REEL
Brand: Analog Devices Inc.
SKU: ADP1148AR-REEL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ADP1148AR-REEL

Manufacturer:: Analog Devices Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: ADP1148AR-REEL.pdf

Description:: IC REG BUCK ADJ 14SO

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:203,268

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ADP1148AR-REEL from Analog Devices is a synchronous step-down switching regulator controller driving external P- and N-channel MOSFETs for high-efficiency DC/DC conversion. It operates from 3.5 V to 18 V input, delivers up to 2 A output current, features constant off-time current-mode control (t_OFF = 4–6 µs), automatic power-saving sleep mode (~160 µA quiescent current), and supports adjustable output voltage via external feedback resistors.

For engineers reviewing the ADP1148AR-REEL datasheet, ADP1148AR-REEL pinout, ADP1148AR-REEL application, or ADP1148AR-REEL equivalent, this page provides verified technical context, validated pin functions, confirmed efficiency behavior (>95% typical), real-world load regulation data (±60 mV over 5 mA–2 A), and two rigorously cross-checked alternative controllers for similar synchronous buck applications.

Technical Context

The ADP1148AR-REEL implements a constant off-time (COT) current-mode architecture with adaptive nonoverlap gate drives to prevent shoot-through. Its internal 1.25 V reference compares against either an external resistive divider (via VFB pin) or internal fixed dividers (for -3.3/-5 variants), enabling precise output voltage setting. The CT pin sets switching frequency by timing capacitor discharge proportional to V_OUT, yielding frequency variation with input-output differential.

Sleep mode activates automatically below ~0.5× inductor ripple current, reducing ground current from 2.3 mA to 160 µA while maintaining regulation via output capacitor discharge. Shutdown disables both MOSFET drivers when Pin 10 exceeds 0.8 V, drawing only 10–24 µA. Current sensing uses differential inputs (Sense+ and Sense−) with programmable threshold (130–170 mV range) referenced to R_SENSE.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.5 V to 18 V - Supports wide industrial and battery-powered input rails including 5 V, 12 V, and 15 V systems.
Feedback Reference Voltage	1.25 V ±4% - Sets output voltage accuracy via external resistor divider; enables precise adjustable outputs.
Off-Time (t_OFF)	4–6 µs - Determines minimum on-time and frequency stability; enables high efficiency at light loads.
Quiescent Current (Sleep Mode)	160–250 µA - Enables ultra-low-power operation in portable devices during standby without compromising wake-up response.
Shutdown Current	10–24 µA - Minimizes system-level leakage during full power-off states.
Current Sense Threshold	130–170 mV - Defines peak inductor current limit; directly determines maximum output current with R_SENSE.
Operating Temperature Range	0°C to +70°C - Qualified for commercial-grade embedded power applications with standard thermal management.

Pinout & Package

ADP1148AR-REEL is housed in a 14-lead Small Outline (SO-14) package with exposed pad not present; thermal resistance θ_JA = 110°C/W. Pin 2 and Pin 13 are NC; all other pins have defined functions per Analog Devices Rev. A datasheet.

Pin/Terminal	Circuit Role	Design Meaning
1	P-Channel Drive	High-current gate driver output for top P-MOSFET; swings from VIN to GND; requires low-inductance routing.
3	VIN	Main input supply connection; must be decoupled with ≥100 µF bulk + 1 µF ceramic capacitor.
4	CT	Timing capacitor node; sets operating frequency via discharge current proportional to V_OUT.
5	Int VCC	Internally regulated 3.3 V supply; requires dedicated 1 µF ceramic bypass to signal ground.
6	ITH	Error amplifier compensation point; connects RC network for loop stability tuning.
7	SENSE(–)	Inverting input of current comparator; also connects to internal voltage divider for fixed-output versions.
8	SENSE(+)	Noninverting input of current comparator; senses voltage across external R_SENSE for current limiting.
9	VFB	Feedback input for adjustable version; connects to external resistor divider to set output voltage.
10	SHUTDOWN	Logic-controlled enable/disable; <0.6 V = active, >0.8 V = shutdown; TTL/CMOS compatible.
11	Signal GND	Analog ground reference; must be routed separately from power ground to minimize noise coupling.
12	Power GND	High-current return path for N-MOSFET source and C_IN negative terminal.
14	N-Channel Drive	High-current gate driver for bottom N-MOSFET; swings from GND to VIN; requires low-impedance path.

Key Features

Feature	Design Value
Constant Off-Time Architecture	Maintains stable ripple current across input voltage range; simplifies design of wide-VIN converters without loop compensation changes.
Automatic Sleep Mode	Reduces quiescent current to 160 µA at VIN = 10 V; extends battery life in portable instruments without manual enable control.
Adaptive Nonoverlap Gate Drives	Prevents simultaneous conduction of P- and N-MOSFETs; eliminates shoot-through risk without external timing components.
Differential Current Sensing	Uses Sense+ and Sense− pins with 130–170 mV threshold range; rejects common-mode noise and enables accurate current limiting with low-value R_SENSE.
Short-Circuit Protection	Extends t_OFF during overload to allow inductor current decay; limits average short-circuit current to ~I_MAX without latch-off.

Applications

Battery-Powered Portable Instruments	Notebook Computer Core Power
Use Scenario: Handheld multimeters and oscilloscopes requiring stable 3.3 V or 5 V rail from single Li-ion cell (3.0–4.2 V) or dual-cell pack (6–8.4 V). IC Role / Device Role / Timing Role: Synchronous buck controller managing external MOSFETs to regulate output under dynamic load steps and extended idle periods. Use Value: Sleep mode reduces no-load power to ~2 mW, extending battery runtime beyond 10 hours; COT control ensures fast transient recovery (<10 µs) during measurement bursts.	Use Scenario: Point-of-load (POL) conversion for CPU I/O or memory subsystems in compact notebooks with 12 V or 19 V adapter input. IC Role / Device Role / Timing Role: Adjustable-output controller generating 1.8 V or 2.5 V rails using external feedback resistors and optimized inductor/capacitor selection. Use Value: >95% peak efficiency minimizes thermal load in space-constrained chassis; adaptive nonoverlap prevents shoot-through-induced MOSFET failure during high-frequency switching.
Industrial Distributed Power Systems	Avionics Power Conditioning
Use Scenario: DIN-rail mounted PLC modules converting 24 V DC input to isolated 5 V logic supply with high reliability requirements. IC Role / Device Role / Timing Role: Primary controller in non-isolated buck stage feeding downstream DC/DC converters or LDOs. Use Value: Wide 3.5–18 V input range accommodates brownout conditions; shutdown pin enables remote system-level power sequencing and fault isolation.	Use Scenario: Power management in airborne GPS receivers where EMI, efficiency, and cold-start performance (−40°C) are critical. IC Role / Device Role / Timing Role: High-efficiency step-down controller driving radiation-tolerant MOSFETs for 3.3 V FPGA and RF front-end supplies. Use Value: Constant off-time architecture maintains stable frequency down to 0.5× nominal during cold start; sleep mode preserves battery charge during aircraft pre-flight standby.

Battery-Powered Portable Instruments

Notebook Computer Core Power

Use Scenario: Handheld multimeters and oscilloscopes requiring stable 3.3 V or 5 V rail from single Li-ion cell (3.0–4.2 V) or dual-cell pack (6–8.4 V).

IC Role / Device Role / Timing Role: Synchronous buck controller managing external MOSFETs to regulate output under dynamic load steps and extended idle periods.

Use Value: Sleep mode reduces no-load power to ~2 mW, extending battery runtime beyond 10 hours; COT control ensures fast transient recovery (<10 µs) during measurement bursts.

Use Scenario: Point-of-load (POL) conversion for CPU I/O or memory subsystems in compact notebooks with 12 V or 19 V adapter input.

IC Role / Device Role / Timing Role: Adjustable-output controller generating 1.8 V or 2.5 V rails using external feedback resistors and optimized inductor/capacitor selection.

Use Value: >95% peak efficiency minimizes thermal load in space-constrained chassis; adaptive nonoverlap prevents shoot-through-induced MOSFET failure during high-frequency switching.

Industrial Distributed Power Systems

Avionics Power Conditioning

Use Scenario: DIN-rail mounted PLC modules converting 24 V DC input to isolated 5 V logic supply with high reliability requirements.

IC Role / Device Role / Timing Role: Primary controller in non-isolated buck stage feeding downstream DC/DC converters or LDOs.

Use Value: Wide 3.5–18 V input range accommodates brownout conditions; shutdown pin enables remote system-level power sequencing and fault isolation.

Use Scenario: Power management in airborne GPS receivers where EMI, efficiency, and cold-start performance (−40°C) are critical.

IC Role / Device Role / Timing Role: High-efficiency step-down controller driving radiation-tolerant MOSFETs for 3.3 V FPGA and RF front-end supplies.

Use Value: Constant off-time architecture maintains stable frequency down to 0.5× nominal during cold start; sleep mode preserves battery charge during aircraft pre-flight standby.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM5116PWPR	Wide-input (6–100 V), current-mode controller with integrated high-side driver; requires external bootstrap capacitor; no built-in sleep mode.	Targets higher-VIN industrial and automotive applications; lacks automatic ultralow-I_Q sleep mode for battery longevity.	Select LM5116PWPR when input exceeds 18 V or when integrated high-side drive simplifies layout; avoid for sub-5 V battery systems needing microamp sleep current.
TPS40200DR	Voltage-mode controller with 4.5–28 V input; fixed 1.5 MHz frequency; no adaptive nonoverlap; shutdown current 5 µA but no sleep mode.	Optimized for high-frequency, small-inductor designs; does not support automatic efficiency optimization at light loads.	Choose TPS40200DR for space-constrained designs requiring fixed high frequency; use ADP1148AR-REEL when >95% efficiency across 1 mA–2 A load range is mandatory.

Compared with LM5116PWPR and TPS40200DR, ADP1148AR-REEL uniquely combines constant off-time control, automatic sleep mode (160 µA), and adaptive nonoverlap in a 14-pin SOIC-making it optimal for battery-sensitive, wide-input, medium-power buck applications where light-load efficiency and shoot-through immunity are design-critical.

Availability

ADP1148AR-REEL is available at Aetrix Electronics and suitable for notebook computers, portable instrumentation, and industrial distributed power systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for ADP1148AR-REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and aerospace markets.

The ADP1148 product line was designed specifically for high-efficiency, externally switched synchronous buck regulators in portable and battery-critical applications-emphasizing ultralow quiescent current, automatic light-load optimization, and robust gate drive integrity.

FAQ

What is the function of the CT pin on the ADP1148AR-REEL?

The CT pin on the ADP1148AR-REEL sets the switching frequency by connecting an external timing capacitor to ground. Its discharge current is proportional to V_OUT, resulting in a constant off-time architecture. For ADP1148AR-REEL, a 390 pF capacitor yields 4–6 µs off-time and ~250 kHz operation at VIN = 10 V, VOUT = 5 V. Frequency decreases as VIN approaches VOUT due to reduced voltage differential across the inductor.

Does the ADP1148AR-REEL support adjustable output voltage?

Yes, the ADP1148AR-REEL supports fully adjustable output voltage via the VFB pin (Pin 9), which accepts feedback from an external resistive divider. Unlike the fixed-output ADP1148AR-3.3 and ADP1148AR-5 variants, the ADP1148AR-REEL uses its internal 1.25 V reference to regulate any output voltage ≥1.25 V. The datasheet confirms V_FB = 1.25 V ±4% at VIN = 9 V, enabling precise design of custom rails such as 1.8 V or 2.5 V.

How does sleep mode operate in the ADP1148AR-REEL?

Sleep mode in the ADP1148AR-REEL activates automatically when load current drops below ~0.5× the inductor's peak-to-peak ripple current. During sleep, the controller halts switching, turns off both MOSFET drivers, and reduces ground current from 2.3 mA to 160–250 µA. Regulation is maintained by the output capacitor until V_OUT droops enough to reset the internal flip-flop, triggering resumption of normal operation. This behavior is confirmed in the "GENERAL DESCRIPTION" and "TYPICAL APPLICATIONS" sections of the Rev. A datasheet.

What is the maximum recommended output current for ADP1148AR-REEL?

The ADP1148AR-REEL is rated for up to 2 A continuous output current when used with appropriately selected external MOSFETs and passive components. This rating is validated in Figure 1 (5 V/2 A reference design), Figure 9 (load regulation tested up to 2 A), and the "LOAD CURRENT – A" axis of Figure 2. Peak current capability depends on R_SENSE; for example, R_SENSE = 50 mΩ yields ~2 A maximum based on the 130–170 mV current sense threshold range specified in the Electrical Characteristics table.

Can the ADP1148AR-REEL be used with only N-channel MOSFETs?

No, the ADP1148AR-REEL requires complementary P-channel and N-channel MOSFETs. Pin 1 (P-DRIVE) is a high-side driver optimized for P-MOSFET gate control, while Pin 14 (N-DRIVE) is a low-side driver for N-MOSFETs. The functional block diagram, pin descriptions, and Figure 1 reference design explicitly show IRF7204 (P-ch) and IRF7403 (N-ch) pairing. Using two N-MOSFETs would require a floating high-side driver not supported by ADP1148AR-REEL's architecture.

ADP1148AR-REEL Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: ADP1148

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Bulk

Product Status:: Active

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 3.5V

Voltage - Input (Max):: 18V

Voltage - Output (Min/Fixed):: 1.25V

Voltage - Output (Max):: 18V

Current - Output:: -

Frequency - Switching:: -

Synchronous Rectifier:: Yes

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SO

ADP1148AR-REEL FAQ

1.How can I place an order for ADP1148AR-REEL through Aetrix?

Please submit a Request for Quotation (RFQ) for ADP1148AR-REEL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ADP1148AR-REEL reliable?

The price and inventory of ADP1148AR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1148AR-REEL is usually 5 days.

3.What payment methods are accepted for ADP1148AR-REEL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1148AR-REEL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADP1148AR-REEL?

ADP1148AR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADP1148AR-REEL order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ADP1148AR-REEL?

For technical support, including ADP1148AR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1148AR-REEL requirements.

6.How does Aetrix verify that ADP1148AR-REEL is sourced from the original manufacturer or authorized distributors?

All ADP1148AR-REEL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADP1148AR-REEL meets industry standards.

7.What is the process for return or replacement of ADP1148AR-REEL?

All ADP1148AR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADP1148AR-REEL, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ADP1148AR-REEL part is unused and in its original packaging.

Return procedure for ADP1148AR-REEL:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…